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October 21, 2009 16:55
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A Rake Task that makes it stupid-easy to render ERB templates to disk
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################################## | |
# MIT LICENSE | |
# Copyright (C) 2012 Luke Bayes | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to deal | |
# in the Software without restriction, including without limitation the rights | |
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
# copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in all | |
# copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
# SOFTWARE. | |
require 'erb' | |
# DynamicAccessors source file found here: http://gist.github.com/215257 | |
require File.dirname(__FILE__) + '/dynamic_accessors' | |
module Sprout # :nodoc | |
# Rake task that makes it stupid-easy to render ERB templates | |
# to disk. Just add parameters to the yielded object, and | |
# they will be available to your Template. | |
# | |
# erb_resolver 'config/SomeFile.xml' do |t| | |
# t.param1 = 'value' | |
# t.other_param = 'other value' | |
# t.another_param = ['a', 'b', 'c'] | |
# t.template = 'config/SomeFile.xml.erb' # Optional - will automatically look here... | |
# end | |
# | |
class ERBResolver < Rake::FileTask | |
include DynamicAccessors | |
# File to create from the rendered | |
# ERB template. This value will | |
# default to the Task name in order | |
# to be consistent with other FileTasks | |
attr_accessor :output | |
# Path to the input ERB template. This | |
# value will default to the value of | |
# "#{ERBResolver.output}.erb" | |
attr_accessor :template | |
def initialize(name, app) # :nodoc: | |
super | |
end | |
def define | |
end | |
def prepare | |
prepare_prerequisites | |
end | |
def execute(*args) | |
super | |
content = nil | |
File.open(template, 'r') { |f| content = f.read } | |
result = ERB.new(content, nil, '>').result(binding) | |
File.open(output, 'w') { |f| f.write(result) } | |
puts ">> Created ERB output at: #{output} from: #{template}" | |
end | |
def self.define_task(args, &block) | |
t = super | |
if(t.is_a?(ERBResolver)) | |
yield t if block_given? | |
t.define | |
t.prepare | |
end | |
return t | |
end | |
def template | |
@template ||= "#{output}.erb" | |
end | |
def output | |
@output ||= self.name | |
end | |
protected | |
def prepare_prerequisites | |
prerequisites << file(template) | |
CLEAN.add(output) | |
end | |
end | |
end | |
def erb_resolver(args, &block) | |
Sprout::ERBResolver.define_task(args, &block) | |
end |
Thanks for the kind words.
Done.
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This is a lovely Rake task. Would you be willing to clarify copyright and license for this? I would like to adapt it as part of a code base that will be under the MIT license.